/Engine/Source/Runtime/Core/Public/Misc/ConfigContext.h
Create a context to read a hierarchy, but once it reaches the given filename (StartDeletingFilename), it will not read in anymore files at that point
static [FConfigContext](API\Runtime\Core\Misc\FConfigContext) ReadUpToBeforeFile ( [FConfigFile](API\Runtime\Core\Misc\FConfigFile) & DestConfigFile, const [FString](API\Runtime\Core\Containers\FString) & Platform, const [FString](API\Runtime\Core\Containers\FString) & StartSkippingAtFilename )